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Category: NLP

Categories
.Net A.I Azure C# LLM NLP

Using C# and Azure OpenAI services

If you have access to Azure OpenAI services, the following code snippet shows how to chat with ChatGPT!

Some general tips:

  1. Secure your networks, i.e use private endpoints inside Azure! Stolen keys can be used by other people if the network is not secured.

This code example is C# version of what’s discussed in https://github.com/AzureCosmosDB/Azure-OpenAI-Python-Developer-Guide/blob/main/05_Explore_OpenAI_models/README.md

The above link is for Python developers, this blog post for C# developers.

var chatClient = new OpenAIClient(new Uri(azureEndPoint), 
       new AzureKeyCredential(apiKey));

var chatCompletionOptions = new ChatCompletionsOptions();

chatCompletionOptions.DeploymentName = "gpt35";

chatCompletionOptions.Messages.Add(new
    ChatRequestSystemMessage("You are a helpful, fun and friendly sales assistant for Cosmic Works, a bicycle and bicycle accessories store."));

chatCompletionOptions.Messages.Add(new 
    ChatRequestUserMessage("Do you sell bicycles?"));

chatCompletionOptions.Messages.Add(new
    ChatRequestAssistantMessage("Yes, we do sell bicycles. What kind of bicycle are you looking for?"));

chatCompletionOptions.Messages.Add(new
    ChatRequestUserMessage("I'm not sure what I'm looking for. Could you help me decide?"));

var response = await 
    chatClient.GetChatCompletionsAsync(chatCompletionOptions);

if (response != null && response.Value != null && 
    response.Value.Choices != null && 
    response.Value.Choices.Count > 0)
{

    System.Console.WriteLine(
        response.Value.Choices.ElementAt(0).Message.Content);
}

The above code has 3 configuration variables:

  1. azureEndPoint – This is the endpoint from Azure Portal.
  2. apiKey – One of the API keys from Azure Portal.
  3. The deployment name of the model that has been added through Azure Portal.

If the code was run successful, output looks like this:

If there is network connectivity issues, there might be exceptions, if denied due to network security issues errors might be like the following:

I don’t have any fake aliases, nor any virtual aliases like some of the the psycho spy R&AW traitors of India. NOT associated – “ass”, eass, female “es”, “eka”, “ok”, “okay”, “is”, “erra”, yerra, karan, kamalakar, diwakar, kareem, karan, sowmya, zinnabathuni, bojja srinivas (was a friend and batchmate 1998 – 2002), mukesh golla (was a friend and classmate 1998 – 2002), thota veera, uttam’s, bandhavi’s, bhattaru’s, thota’s, bojja’s, bhattaru’s or Arumilli srinivas or Arumilli uttam (may be they are part of a different Arumilli family – not my family).

–

Mr. Kanti Kalyan Arumilli

Arumilli Kanti Kalyan, Founder & CEO
Arumilli Kanti Kalyan, Founder & CEO

B.Tech, M.B.A

Facebook

LinkedIn

Threads

Instagram

Youtube

Founder & CEO, Lead Full-Stack .Net developer

ALight Technology And Services Limited

ALight Technologies USA Inc

Youtube

Facebook

LinkedIn

Phone / SMS / WhatsApp on the following 3 numbers:

+91-789-362-6688, +1-480-347-6849, +44-07718-273-964

+44-33-3303-1284 (Preferred number if calling from U.K, No WhatsApp)

kantikalyan@gmail.com, kantikalyan@outlook.com, admin@alightservices.com, kantikalyan.arumilli@alightservices.com, KArumilli2020@student.hult.edu, KantiKArumilli@outlook.com and 3 more rarely used email addresses – hardly once or twice a year.

Categories
.Net A.I Artificial Intelligence C# Llama LLM NLP

How to get text embeddings from Meta Llama using C# .Net

This post is about getting text embeddings i.e vector representation of text using C# .Net and using Meta’s Llama 2!

Meta’s Llama

Meta (Facebook) has released few different LLM’s, the latest Llama3, but this blog post about Llama2. Using Llama3 might be similar, but I have not tried yet! There are few more things that can be tried, but those are out of scope and this is an end to end blog post for using Llama2 using C#.

https://llama.meta.com/

From the above link provide click “Download Models”, provide information. Then links to some github, some keys are provided. Make note of the keys. The keys are valid for 24 hours and each model can be downloaded 5 times.

llama.cpp

We use llama.cpp for certain activities:

https://github.com/ggerganov/llama.cpp

LLamaSharp

This is the wrapper for interacting from C# .Net with Llama models.

I have introduced the tools and software that are going to be used. Now, let’s look at the different steps:

  1. Download Llama model (Meta’s Llama has Llama 2 and Llama 3, each has smaller and larger models, this discusses the smallest model from Llama 2)
  2. Prepare and convert Llama model into gguf format.
  3. Use in C# code

Download Llama model:

Once you submit your information and receive the keys from Meta Facebook, clone the repo:

https://github.com/meta-llama/llama for Llama2,

https://github.com/meta-llama/llama3 for Llama3

git clone https://github.com/meta-llama/llama

Navigate into llama folder, then run download.sh

cd llama
sudo ./download.sh

You would be prompted for the download key, enter the key.

Now 12.5 GB file gets downloaded into a folder “llama-2-7b”

Prepare and convert Llama model into gguf format:

We are going to convert the Llama model into gguf format. For this we need Python3 and Python3-Pip, if these are not installed, install using the following command

sudo apt install python3 python3-pip

Clone the llama.cpp repo into a different directory.

git clone https://github.com/ggerganov/llama.cpp

Navigate into llama.cpp and compile

cd llama.cpp
make -j

Install the requirement for python:

python3 -m pip install -r requirements.txt

Now copy the entire “llama-2-7b” into llama.cpp/models.

Listing models directory should show “llama–2-7b”

ls ./models
python3 convert.py models/llama-2-7b/

This generates a 2.17 GB file ggml-model-f32.gguf

Now run the following command:

./quantize ./models/llama-2-7b/ggml-model-f32.gguf ./models/llama-2-7b/ggml-model-Q4_K_M.gguf Q4_K_M

This should generate a 3.79 GB file.

Optional (I have NOT tried this yet)

The following extra params can be passed for the python3 convert.py models/llama-2-7b/

python convert.py models/llama-2-7b/ --vocab-type bpe

C# code

Create a new or in an existing project add the following Nuget packages:

LLamaSharp

LLamaSharp.Backend.Cpu or LLamaSharp.Backend.Cuda11 or 
LLamaSharp.Backend.Cuda12 or LLamaSharp.Backend.OpenCL

// I used LLamaSharp.Backend.Cpu

Use the following using statements:

using LLama;
using LLama.Common;

The following code is adapted from the samples of LlamaSharp – https://github.com/SciSharp/LLamaSharp/blob/master/LLama.Examples/Examples/GetEmbeddings.cs

string modelPath = PATH_TO_GGUF_FILE

var @params = new ModelParams(modelPath) {EmbeddingMode = true };
using var weights = LLamaWeights.LoadFromFile(@params);
var embedder = new LLamaEmbedder(weights, @params);

Use the path for your .gguf from quantize step file’s path.

Here is code for getting embeddings:

float[] embeddings = embedder.GetEmbeddings("Hello, this is sample text for embeddings").Result;

Hope this helps some people, I am .Net developer (primarily C#), A.I enthusiast.

I don’t have any fake aliases, nor any virtual aliases like some of the the psycho spy R&AW traitors of India. NOT associated – “ass”, eass, female “es”, “eka”, “ok”, “okay”, “is”, “erra”, yerra, karan, kamalakar, diwakar, kareem, karan, sowmya, zinnabathuni, bojja srinivas (was a friend and batchmate 1998 – 2002), mukesh golla (was a friend and classmate 1998 – 2002), thota veera, uttam’s, bandhavi’s, bhattaru’s, thota’s, bojja’s, bhattaru’s or Arumilli srinivas or Arumilli uttam (may be they are part of a different Arumilli family – not my family).

–

Mr. Kanti Kalyan Arumilli

Arumilli Kanti Kalyan, Founder & CEO
Arumilli Kanti Kalyan, Founder & CEO

B.Tech, M.B.A

Facebook

LinkedIn

Threads

Instagram

Youtube

Founder & CEO, Lead Full-Stack .Net developer

ALight Technology And Services Limited

ALight Technologies USA Inc

Youtube

Facebook

LinkedIn

Phone / SMS / WhatsApp on the following 3 numbers:

+91-789-362-6688, +1-480-347-6849, +44-07718-273-964

+44-33-3303-1284 (Preferred number if calling from U.K, No WhatsApp)

kantikalyan@gmail.com, kantikalyan@outlook.com, admin@alightservices.com, kantikalyan.arumilli@alightservices.com, KArumilli2020@student.hult.edu, KantiKArumilli@outlook.com and 3 more rarely used email addresses – hardly once or twice a year.

Categories
.Net C# NLP

C# .Net, Python and NLP – Natural Language Processing

The available NLP libraries for C# are very less. Some of the best NLP libraries are in Python. There are few C# implementations that either are a re-write of Python’s implementations or wrappers.

If you are serious about any NLP related work in C#, use well-maintained Python implementations and integrate with C#. The wrappers / re-write’s might not have much support.

Let’s look at 2 popular libraries:

NLTK – Natural Language Toolkit

spaCy – Industrial-Strength Natural Language Processing

Both the libraries are well documented and easy to use. i.e even C# developer like me can understand the python code examples provided. And very easy to experiment.

Now here are some ways of integrating with C#:

  1. Have a separate set of micro-services or message based applications for NLP.
  2. Use some of the following libraries that attempt to integrate Python with .Net
  3. Use System.Diagnostics.Process class i.e run the Python program as a separate process.

The integration libraries are:

Python.NET

IronPython

Python.Included

I don’t have any fake aliases, nor any virtual aliases like some of the the psycho spy R&AW traitors of India. NOT associated – “ass”, eass, female “es”, “eka”, “ok”, “okay”, “is”, “erra”, yerra, karan, kamalakar, diwakar, kareem, karan, sowmya, zinnabathuni, bojja srinivas (was a friend and batchmate 1998 – 2002), mukesh golla (was a friend and classmate 1998 – 2002), thota veera, uttam’s, bandhavi’s, bhattaru’s, thota’s, bojja’s, bhattaru’s or Arumilli srinivas or Arumilli uttam (may be they are part of a different Arumilli family – not my family).

–

Mr. Kanti Kalyan Arumilli

Arumilli Kanti Kalyan, Founder & CEO
Arumilli Kanti Kalyan, Founder & CEO

B.Tech, M.B.A

Facebook

LinkedIn

Threads

Instagram

Youtube

Founder & CEO, Lead Full-Stack .Net developer

ALight Technology And Services Limited

ALight Technologies USA Inc

Youtube

Facebook

LinkedIn

Phone / SMS / WhatsApp on the following 3 numbers:

+91-789-362-6688, +1-480-347-6849, +44-07718-273-964

+44-33-3303-1284 (Preferred number if calling from U.K, No WhatsApp)

kantikalyan@gmail.com, kantikalyan@outlook.com, admin@alightservices.com, kantikalyan.arumilli@alightservices.com, KArumilli2020@student.hult.edu, KantiKArumilli@outlook.com and 3 more rarely used email addresses – hardly once or twice a year.